For example, if you have [ -4 1 0 3] as your matrix, it would be negative 4. Whatever negative number is in your matrix is your answer.
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In linear algebra, a skew-symmetric matrix is a square matrix .....'A'
The first study of matrix algebra happened when Hermann Grassmann published "Theory of Extension" in 1844. In 1848, James Sylvester coined the term matrix while studying linear algebra.
In the context of matrix algebra there are more operations that one can perform on a square matrix. For example you can talk about the inverse of a square matrix (or at least some square matrices) but not for non-square matrices.
YEs
Nope! An integer can be negative though